The existence and development of robots will reshape our life and provide incredible positive energy，but it also introduces new problems beyond technical scopes，even including problems of negative impact，which can be due to that robots have some human-like intelligence property． This article discusses the problems that might be incurred by robots．According to the degree of intelligence，robots fall into three categories：robots without intelligence，intelligent robots，and biorobots．named robot 1.0，robot 2.0 and robot 3.0 respectively．The technical features of robot 2．0 are specifically analyzed and the problems between robots and humans，robots and society are discussed．As the robots become inseparable members of our society，their rights and legal status should be noticed。their negative impact must be bewared of。and the enactment of laws related to robots ought to be put on the agenda.